Mechanical movement



(No Model.)

W. s; JQHNSON. MEUHANIGAL MOVEMENT.

Patented July 16, 1895.

Wmme/a l l l SWW/lo@ NrTED STATES PATENT OFFICE.

WARREN s. JOHNSON, or MILWAUKEE, WISCONSIN.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 542,708, dated July 16,1895.

Application filed February 8, 1895. Serial No.V 537,689- (No model.)

To @ZZ whom, zi may concern: l

Be it known that I, WARREN S. JOHNSON, a

citizen of the United States, residing at Miln waukee, in the county ofMilwaukee and State of Wisconsin, have invented certain new and usefulImprovements in Mechanical Movements, of which the following is aspecication.

This invention consists in a novel mechanism or mechanical movementdesigned to convert or translate a relatively slow and gradual movementinto a quick or sudden movement. y

The mechanism is susceptible of various applications, such asadjusting-signals, moving valves and dampers, shifting-clutches,0perating photographic camera-shutters, and the like, and my purpose isto claim the mechanism broadly and apart from any other structure ordevice, and to make and sell the In many situations it is desirable oreven essential to the attainment of a given result that one part ordevice be given a sudden throwfrom one to the otherlimit of its rangeofl movement. On the other hand, it is often the case that the onlyavailable or convenient prime motor for imparting motion to such part ordevice isa slowly-acting motor, such as a piston, moving within acylinder to which fluid under pressure is admitted quite slowly or alever actuated by a float in a tank of considerable capacity. 4Undersuch circumstances an intermediate mechanism or translating devicebecomes desirable or even essential, and to meet this requirement is thepurpose of the present invention.

It is to be understood that so far as the part to be actuated or4controlled and so far as the particular prime motor are concerned, theembodiment of tiny-invention here represented is merely typical orillustrative, these `matters being variable at will or as circum-Astances require.

Referring now to the drawings, A indicates a base or back plate designedto carry the various parts of the mechanism.'

B indicates a yoke or forked bracket, to the arms of `which is pivoted aframe C, here represented as extending- `upward in asubstantially-vertical plane above the pivot-rod d. Anv arm b extendsdownward below the pivot-rod a, and is provided with a stud c to enterone end of a spiral spring D, the oppo-J site end of which rests againstan adjustable nut E, vscrewed upon 'a threaded stem or post F,projecting from the back plate A.

The spring D tends to throw the upper end of frame C inward or towardthe back plate A with a force dependent upon the adjustment of nut E. l

G G is .a toggle, the upper member G of 'which is pivotally carried by`across-rod CZ at Or near theupper end of swinging frame C. The lowermember G' of thetoggle carries a vcross-rod e, the ends of which areshouldered or reduced and extend into slots or elongated openingsf inthe side bars of frame C.

H H indicate two helical springs, each attached at one end to cross-rodd and at the other end to cross-rod e, and tending constantly to drawthe latter toward the former.

From what has been stated it will be seen that when the toggle GG isstraightened, so that the pivot or joint connecting its two members isin alignment with the cross-rods CZ and e, said rods will be separatedto the greatest distance practicable, and the springs H H will beelongated and put under the greatest tension possible under thedescribed arrangement of parts. lt also follows that if the joint orpivot g of the toggle passes to either side of a straight lineconnecting the crossrods d e the springs H H will immediately draw thecrossrod c toward the cross-rod a., and thereby bend or bow the toggleuntil the tension of the springs is taken up or a stop is encountered.u

The upper member G of the toggle is extended above or beyond the axis ofits pivot d and is preferably fashioned into a fork j, as shown in Fig.l, the arms of which are provided with inwardly-projecting studs,astshown. These studs enter a circumferential groove in a block or nutI, carried by a rod or stem J, which is guided in a neck or bossprojecting from back plate A and is capable ot' a limited longitudinalmovement.

n the drawings I have represented rod J as provided with a boss or stoph tolimit the movement of the rod in one direction, its reverse movementbeing restricted the nut ro I. By adjusting the nut upon the rod J therange or extent of movement ot the rod canbe regulated and determined,

Rod J may connect in anyconvenien't manner with or may be an integralpart ot thede vice or member requiring the quick throw,

and, in; fact, is` often m adel the steinfof;yx a vahvet,

The throw or play of frame @ly isinegulated andcerer-minedbirstepenntS-K and Liscnewed l upon a threaded postor stem;M5 projecting zo from the back platemasishownin the; several figures.

Eer the. punpose oli actuating the djevice; L have rer-resented in-Figsv L and, 2: een dwiskfor headl Ni, carried by frame,V G, and resting-upon a exl'ible diaphragm- Oficonstiwt.-

in gone walh ofy a, timidi-.pressure champ l?. Chamber l? issufpipliedwith; fini-df OI Miki@ under pressure, which ente-rs, by a quite restnietedpassager', and consequeutlyftheitllf 3o ing of the chamber-r isgradual and the mover,A

mentofy head N and frame. C produced by 1 the fluid-pressure behind the.dfigkaphragrni Q- wilfl; Likewise; be. gradual orA comparatively l slow.The same is true where acyljind-ery and piston are substituted; for the`flexible diaphragm, as in Fig. Standl so, ot many other actuatingdevicesithat may be employed.,

'Assn-mingtg-hat the partisbe inftheA position indicated in Figs, L and3*, which; isi the pest,

4o tion they assume,when` notoizceis actin g1 upo n frame C tothnow itoutward,Uherodorstern J, beingtheniat thelirnit-,oii its onL wardEnQMeuntil, carried just beyond thisA4 plane the2 tog gle G; G extendsspnings H: ihhut theiinstant,

5 5 thatplaneis:passedsaid spningscontract, dfraw thei'crossfrod; eupwardvandi `now the. toggle outward,4 as, in Fig. 2, and;r in doing solthnowtheL fork` j, quickly inward. to, the.y tull( limitv ofinovementpermittedbynut orablocl; I'. 'Ihus 5o avery gradual movement oftheftgrame@ and; of the motor which actuates it is translated into-` aquick and positive movementot the stemt J and` of; anyl part tonmedwithL onca-nried'Y by it., 0n theotherv hand, iftiltevstell-` L106.2112.

theinner limit of itsthrowor movement-as inl Fig.l inwhich. case thenutI? will bear against the end of the guidingfboss of stem J, the yoke orfork j willA bear against the nut and be thereby held at rest. If, now,the fluid Within chamber P be' allowed to escape slowly, the spring D,acting upon frame C, will gradually swing it inward to the positionindicated ifn- Fig'. 2, but as the f'orkj is prevented by the nut I frommoving bodily inward with the trarne the member G of the toggle will becaused to rock upon its pivot d and to swing the two members of thetoggle into line and ,y thenpast theplaneof pivots d e. When this planeis passed the toggle will be quickly `lbowedinward, andistem J will bethrown sudfdenly outward to the limit of its movement. Precisely thesaine action takes; placewhen a l cyljigndzQ-I and; pis-ton; areemployed, as in Fi g. 3. i t-let have repnesented thestem J as pro-V'dged with, astop he, and thenut I- as-arran gedtohear aaai. sttheenfff 0.1;* the neck or boss in w ich,- steing J; isiguildemit; istobeunderstood that these merelyI typicat or illustrative `tot stopsgenerally, which may be applied to, T any part connected withl Stem..The dimensions and the relative propertijous ofI parts, 't2-hein shape,on configuration and; like matters, may be variedas desired fwithoutdeparting from the spirit and scope ot? my invention, Eheiyoke 71maybe-replaced by anyequi-valent means ot? connection.

Har/ins thus described my invention, what 11i elairn isrf 1. AAmechanical movement comprising the ollowing elementsin combination:` aswingnsftramei means tee meving said trame-,51 a

toggle carried.e by Said traine. and' having 0n@ member pivote@ and.the; other arranged t0 3 slide therein/'a devieetotbenioved;aconnecition betweeufthe tessleand said device; and a spningconfniectedwfithi and serving.- to bowthe wagte 2. ling cernfbinationI withlamovahl'efd-evice-,as J, provi.ded z with stops toV determine itsrangeof; movement, mechanism ton igmpart-ingasud'- den movement thereto in;opposite, directions, consisti'ngy ofa, swinging frame, meansifior imovin gsaid fname, aftoggle having one memfber pivotally, atta/c1411edlto andtheother arnangedito slideiul said fran1 ea spr-ingenunectiedgwithand tending to; bowV the toggle,-

andai connectiony between the tog-f ,flev and the device tothe moved,substantially asset forth. 3; In combination wit-h aA movable device asJf, having.f a, restricted: range of movement, mechanism fon moving thesame, suddenly iny `gone and the other directiomconsisting of aiswinging trame, a motor iion moving said traine, toggle.- hailing; oneof its members piuoted; in said; trame and connectedvwirththe ,parttodos;r Inoued, and having; its other mem-v ber arrangedg to slide inthel swinging frame, andaspning connected with and: servi-ng to ,i bowthe toggle. A

4-.-. Int combiinationfwfith a m'emberhaving a restricted ran ge ofmovement,k asy J a-nd; with aprimemotor as-N, @,P, a translating deviceIOO IIC

interposed between the member to be moved and the motor, and comprisinga swinging `frame C, a toggle G G' carried therein by pivotal connectiond and sliding connection e, a yoke] extending from the toggle to themember to be moved, and a spring H connected with and serving to bow thetoggle when its three pivots are thrown out of alignment.

5. In combination with a member as J, having a restrict-ed range ofmovement, a swinging frame C, stops to limit the play of said frame, amotor for moving said frame in one direction, a spring for returningsaid frame,

a toggle carried by said frame and having its members respectivelyconnected therewith by pivotal and by sliding connections, a springacting upon and serving to bow the toggle, and a connection between thetoggle and the member to be moved;

In witness whereof I hereunto set my hand zo in the presence of twowitnesses.

WARREN s. JOHNSON.

Vitnesses: v

PAUL F. JOHNSON, L. F. FISH.

